Boiler



March 4, 1930. J. F. c so r AL 1,748,945

BOILER I Filed Dec. 5, 1927 2 Sheets-Shee 1 March 4, 1930..

J. F.DICKSON Er AL I BQILER Filed Dec. 1927 2 Sheets-Sheet 2 "structural 'd iPatented Mar. 93

UNITE T I j j 1 1,748,945

:rosEPH r'QnIcKson ND ROBERT 'rURnER, or KEWANEE, m le, Assrenons,

\ BYMEsn'E ASSIGNMENTS, T KEWANEE BOILER COMPANY, or KEWANEE, rr rz r- V madejof sheet-metal, one of the leading and v f a appliancelof this type which is ivors, A conrom'rron or DELAWARE Application filed 'Decem ber 3, 1927. Serial No. 237,393:

invention pertains to certain features of betterment, both structural and functional, in boilers,'heaters ,andsimilar constructlons .f'principalobjects and purposes being the proso constructed that it requires less stay members than'usual-to give it, adequate strength, which. eliminates riveting 'more or less, or entirely, which affords a better arrangement fortheQefiicient circulation of the water un- V dergoing heating,and which can'be manufactured relatively inexpensively.

'5 T0 theattainmentof these and other desirable aims, a present, "preferred embodiwhich is illustrated in detail in the accomv panyin'g drawings, forming apart of this i specification and to which-reference should be had-inconnection with the following de-' ;.scription, like-reference numerals being rised. throughout the several-views to designatethe,

same parts.

.In these drawings Figure 1 is a central, longitudinal, vertical t [section through the novel and flmproved boiler;

r Figure 2 is a vertical 'cross-section through the boiler online 2+2 of Figure 1,1theparts being viewed in the direction ind cated by the arrows;

v lv-Figure l is an elevation of -the shaped she'et mental combustion chamber; 7 7 v 1 {Figure 5-is side selevationpfthe samemem A 3/40 Figure 3 is a similar section on-line Figure 1, the elements being viewed in the J side. water-legs 16 understood, 9 y I r Suchltmemberj comprises, an upright ,oppositevdireotion, as shown 'by the correlated arrows; i V I metal elementgformingparts of the supple,

b rwnd; Fi ur .6Qis a plan view of the {same part.

' Referring 7 to these dravving's it :vvill; {be 7 observed that the general style and form of the sheet-metalj'boilerwith internal fire-box is not new, the inventionEresidingin certain*- tails gwhichi will presently; be

madeiplainfij v 7 As' is shown,the boiler has a main 'combus t tion ohainber orspace 11, 'whichconnects directly at its-rear vvith 1 a supplemental comor plate 22provided with a do'orwayr23ythat Q5 and 'c, such back .and side' walls being spaced inwardly aways from the corresponding outer'sheets 26 and ,18 and 19 'to-supply the rear2water leg-33 and'extensions of the and 17, as will ,be' readily c onnected to the crown-sheet section byV'unifor'mlycurvedor-rounded parts; 39,39; p '7 On theother hand, however, the back-wall 5 F 34 is joinedito both adjacent side-walls "36', 53,7 1 y ,n

by curved or rounded sections .41, ll-which bustion-ch amber 12 risingsomevvhat higher? than the chamber 11', :the latter having an upwardly arched, transversely corrugated crown-sheet 13 which is integral with the .ver-

tical: plates 14 and 15. constituting the v inner: walls'of the two, side water-legs 16 and 17',

the outer walls 18 and 1 9of-which form parts f j T. I

of themain'boiler shell or casing:21. I r

The front of the boiler ihastheusual wall 7 portion of the front wall below the crownsheet'having a water space 24 formed in conjunction 'with the wall-22 iby a suitablyshaped, inner plate 25, therearoof the boiler having the Customarybackplate 26;,

and join :the'connection 28 with the-chamber '31;connecting-the lower part of the-member" 3 55 Tubes or 'flues 27 extend through ,prop'er,f aligned apertures in the front andback plates the main compartment or fire-x11 through a properly-shaped, aperturedxflue-sheet 32.

' The top TOTCI'QWIl-SllGGt, the inner .backjvvall-andboth innerside-Walls o f uthe suppl'e- I m'entary fire-boX'12 are formed of .asingle,

sheet-metal, plateemeinber, characterized as I a Whole 30 andshaped as shown inFiguresl,

back-,wall '34, a top or crown-sheet wall 35,

the portions which itjoinstogether,-and, in similar manner, the side-walls 36 and 37 are are :IiOtjOf the same vvidthor extentthroughout I their length, but taper downwardly iand' opposite verticalsideawalls 36, 37,:the v 1 back'wall'joiningithecrown-sheet portionby meansof. afcurveld section 88 of'substantially- V uniform curvature throughout the.fvvidthiof .j r

corners or edges are almost square.

The two side-walls are slightly notched'at 42, and the flue-plate 32 is fitted in the upper portion of the mouth or open front side of the shaped member 30, its top and side edges being welded to the inner surfaces of such member, its lower edge being welded or otherwise suitably fastened to the crownsheet 13. a

The lower portions of the side-walls 36, 37 are in register or alignment with the sidewalls 14 and 15, and the edges of the plates 36 and 14 and 37 and 15 are welded together in butting relation;

Thus the back, top and side walls of the complementary or auxiliary fire-box or co1nbustion-chamber are provided by a single, suitably-shaped, metal plate which is welded to the other parts of the structure, hence avoiding the undesired riveting.

Such element 30, by reason of its several strengthening and stifiening curved or rounded sections, is adequately. and sufficiently braced by its own inherent form and shape to materially decrease the amount of staying required to give the structure the proper stren th and althoiwh sta -bolts 43 are used to secure together the spaced plates 26 and and other like members 44 are employed to tie together the side-wall plates 36 and 18 and 37 and 19, the number of such parts used is less than customary and their proximity to the curved portions of the member 80 is less because the latter are strong and rigid enough to brace the adjacent flat or plane portions of the plates some little distance from them. p T

Other stay-bolts 45 are used to join together the separated plates 14 and 18 and 15 and 19 and opposite sides "of the boiler may be fastened together by cross tie-rods 46.

The top portion of the combustion-compartment 12 is extremely hotduring the operation of the boiler, and, for that reason, it

is desirable to providea construction which willaid the efficientcirculation of the water at this part of the boiler, the rounded surfaces specified accomplishing this object, as well as the other advantages just enumerated.

In view of the fact that the upper parts of I the water legs at the rear andsides of the sup ,means for attaining an especially beneficial upward flow of the water in suchlegs as it becomes heated and rises being replaced below bycooler water. 3

The invention, as presented, and as defined by the appended claims, is susceptibleof a variety of embodiments and is not necessarily restricted to the details of structure of the particular preferred boiler selected as a sultable example; V V

We claim:

1. In a heater having a main combustion chamber and a supplemental combustionchamber connected with the rear of said main-chamber and extended higher than the latter, a first metal plate forming the outer shell of'the boiler and the outer side-walls of both chambers, a second front-wall plate for the boiler, a third rear-wall plate for'the boiler, a fourth single metal plate forming the crown-sheet and the inner side-walls of said main-ch amber, a fifth single metal plate forming the crown-sheet, the inner side-walls and the inner rear-wall of said supplementalchamber, a sixth flue-sheet secured to said fifth plate and to the crown-sheet of said main-chamber, andfiues connecting said fiuesheet and said front-wall plate, said side-wall portions of said fourth and fifth plates being welded together, the junctions of said crownsheet of said fifth plate with its rear and side wall portions being curved, and the junctions of said side and rear walls of the same plate being curved and downwardly tapered.

2. In a heater having a main combustionchamber and a supplemental combustionchamber connected with the rear of said main-chamber and extended higher than the latter, a first metal plate forming the outer 1 shell of the boiler and the outer side-walls of fifth plate and to the crown-sheet of said main-chamber,and fines connecting saidflue sheet and said' front-wall plate, said sidewall portions of said fourth and fifth plates being welded together, the junctions of said crown-sheet of saidfifth plate ,with its rear and side wall portions being curved, and the junctions of said side and rear "walls of the same plate being curved. I

' '3. In a heater having a main combustionchamber and a supplemental combustionchamberjconnected to the rear of, and extending higher than, said maincombustion-chamber, the combination of a metal plate forming the outer shell of the heater, a front-wall plate for the heater, a rear-wall plate for the heater, a'metal plate forming the crown-sheet and inner side-walls of said main combustionchaniber, a sheet inet'al structure formingthe brown-sheet, the inner side-walls andthe innerrear-wall of said supplemental combustion-chamber, a flue-sheet secured to said crown-sheets and to the side-walls of said structure, fiues connecting said flue-sheet and front-wall. plate, the marginal portions of the inner side-walls ofsaid combustion-chambers beirig secured. together, the junctions of the side and rear walls ofsaid structure being curved and downwardly tapered. v

In Witness whereof We have hereuntd set ourhand. I v v JOSEPH F. DICKSON.

ROBERT M. TURNER. I

e edo CERTIFICATE or CORRECTION.

Patent No. 1,748, 945. Granted March 4, 1930, to

JOSEPH F. DICKSON ET AL.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously written and printed as "Kewanee Boiler Company, of Kewanee, Illinois, a corporation of Delaware", whereas said name should have been written and printed as "Kewanee Boiler Corporation, of Kewanee, Illinois, a corporation of Delaware", as shown by the records of assignments in this office; and that the said Letters Patent should he read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 25th day of March, A. D. 1930.

, M. J. Moore, (Seal) Acting Commissioner of Patents. 

